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Simplifying 2r + -1r + 3 = 19 Reorder the terms: 3 + 2r + -1r = 19 Combine like terms: 2r + -1r = 1r 3 + 1r = 19 Solving 3 + 1r = 19 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 1r = 19 + -3 Combine like terms: 3 + -3 = 0 0 + 1r = 19 + -3 1r = 19 + -3 Combine like terms: 19 + -3 = 16 1r = 16 Divide each side by '1'. r = 16 Simplifying r = 16
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